Help about TWebView class. reading something from website.

[Horizon]

Hi,

I have read this result in DevTools console.

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document.getElementById("dosya_listesi_result")

Result

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<tbody id="dosya_listesi_result">
    <tr role="row" class="odd">
        <td>Sanık</td>
        <td>Erzurum Bölge Adliye Mahkemesi 6. Ceza Dairesi</td>
        <td>2022/487</td>
        <td>Ceza Dava Dosyası</td>
        <td data-order="1654865877000" class="sorting_1">10.06.2022 15:57:57</td>
        <td>Açık</td>
        <td>
            <button class="btn btn-default btn-sm pull-left" onclick="javascript&#058; void(0);">
                <i class="fa fa-eyes"></i> Dosya Görüntüle</button>
        </td>
    </tr>
    <tr role="row" class="even">
        <td>Sanık</td>
        <td>Erzurum Bölge Adliye Mahkemesi 6. Ceza Dairesi</td>
        <td>2022/348</td>
        <td>Ceza Dava Dosyası</td>
        <td data-order="1650025383000" class="sorting_1">15.04.2022 15:23:03</td>
        <td>Kapalı ( 16.05.2022 11:26:22 )</td>
        <td>
            <button class="btn btn-default btn-sm pull-left" onclick="javascript&#058; void(0);">
                <i class="fa fa-eyes"></i> Dosya Görüntüle</button>
        </td>
    </tr>
    <tr role="row" class="odd">
        <td>Sanık</td>
        <td>Erzurum Bölge Adliye Mahkemesi 6. Ceza Dairesi</td>
        <td>2021/250</td>
        <td>Ceza Dava Dosyası</td>
        <td data-order="1613999200000" class="sorting_1">22.02.2021 16:06:40</td>
        <td>Kapalı ( 23.03.2021 16:31:28 )</td>
        <td>
            <button class="btn btn-default btn-sm pull-left" onclick="javascript&#058; void(0);">
                <i class="fa fa-eyes"></i> Dosya Görüntüle</button>
        </td>
    </tr>
    <tr role="row" class="even">
        <td>Sanık</td>
        <td>Erzurum Bölge Adliye Mahkemesi 6. Ceza Dairesi</td>
        <td>2019/207</td>
        <td>Ceza Dava Dosyası</td>
        <td data-order="1548421164000" class="sorting_1">25.01.2019 15:59:24</td>
        <td>Kapalı ( 28.04.2022 08:48:50 )</td>
        <td>
            <button class="btn btn-default btn-sm pull-left" onclick="javascript&#058; void(0);">
                <i class="fa fa-eyes"></i> Dosya Görüntüle</button>
        </td>
    </tr>
</tbody>

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    xml := oWebView:Eval('document.getElementById("dosya_listesi_result")')  

How Can I read this xml from oWebView? There is not anything in xml var.

[Antonio Linares]

Dear Hakan,

With Method oWebView:Eval() you can execute javascript but you can not get the return value.

To get a return value you have to use oWebView:bOnBind, so to get a returned value you should do:

oWebView:bOnBind = { | cJson, nCalls | MsgInfo( cJson, nCalls ) }
oWebView:Bind( "SendToFWH" )
oWebView:Eval( [SendToFWH( 'document.getElementById("dosya_listesi_result" )' ] )

Sometimes you have to call Sleep( nMillisecs ) to give the browse enough time to process it.

Please review FWH\samples\webviewuni.prg to review a working example

[Horizon]

Hi Antonio,

I have changed that you describe.

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   PROCEDURE XBROWSER_Show(cJson, nCalls)
    XBROWSER cJson slnum TITLE "cJson - Calls:"+NTRIM(nCalls)
RETURN

    oWebView:bOnBind = { | cJson, nCalls | XBROWSER_Show( cJson, nCalls ) }
    oWebView:Bind( "SendToFWH" )
....
....

oWebView:Eval( "SendToFWH( 'I am here' )" )
      aaa := "document.getElementById('dosya_listesi_result' )"
    oWebView:Eval( "SendToFWH( "+aaa+" )" )    

"I am here" message is comes. but next line just comes "[{}]"

[Antonio Linares]

Dear Hakan,

Please try it this way:

oWebView:Eval( "SendToFWH( '" + aaa + "' )" )

Please notice the "red" single quote that I have added at both sides

[Horizon]

Dear Hakan,

Please try it this way:

oWebView:Eval( "SendToFWH( '" + aaa + "' )" )

Please notice the "red" single quote that I have added at both sides

Hi Antonio,

Tried. There is not any message.

[Antonio Linares]

Dear Hakan,

Please right click on the webview, open the inspector and check if there is any error or warning

[Horizon]

Dear Hakan,

Please right click on the webview, open the inspector and check if there is any error or warning

Hi Antonio,

without above code there is only 2 warning.

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oWebView:Eval( "SendToFWH( '"+aaa+"' )" )   

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Audit usage of navigator.userAgent, navigator.appVersion, and navigator.platform
A page or script is accessing at least one of navigator.userAgent, navigator.appVersion, and navigator.platform. Starting in Chrome 101, the amount of information available in the User Agent string will be reduced.
To fix this issue, replace the usage of navigator.userAgent, navigator.appVersion, and navigator.platform with feature detection, progressive enhancement, or migrate to navigator.userAgentData.
Note that for performance reasons, only the first access to one of the properties is shown.
1 source
jquery-migrate-1.2.1.js:1
 

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Deprecated Feature Used
Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user’s experience. For more help, check https://xhr.spec.whatwg.org/ .
1 source
pace.min.js:188
 

with above code there is no more error and warnings.

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oWebView:Eval( "SendToFWH( '"+aaa+"' )" )   

[Antonio Linares]

Dear Hakan,

many thanks for all your feedback about webview

We are all learning about it and its really usefull that we share our findings

[Horizon]

Dear Hakan,

many thanks for all your feedback about webview

We are all learning about it and its really usefull that we share our findings

So, we are waiting.

Where is te WV_SENDTOFWH() function?. Is it internal?

[Antonio Linares]

Dear Hakan,

Yes, it is internal, but as you have checked it works on many other cases. So it seems to me as the sent javascript is not correct.

Have you been able to inspect it (right click on webview) and see if you get any warning or errors there ?

You can trace the javascript code from such inspector. It is very powerful.

[Horizon]

Hi Antonio,

I have insert log messages like below.

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  oWebView:Eval( "SendToFWH( 'I am here' )" )
    
  oWebView:Eval('console.log( "Antonio, Starting here" )')  

  aaa := "document.getElementById('dosya_listesi_result' )"
  oWebView:Eval( "SendToFWH( "+aaa+" )" ) 
  oWebView:Eval('console.log( '+aaa+' )')  

  aaa := 'document.getElementById("yargiTuru").value'
  oWebView:Eval( "SendToFWH( "+aaa+" )" ) 
  oWebView:Eval('console.log( yargiTuru = '+aaa+' )')  
    
    oWebView:Eval('console.log( "Antonio, Finished" )')

The console shows


My app shows like this.


I think javascript is not wrong. there is something wrong getting array variable from twebview.

Any help?

[Antonio Linares]

Dear Hakan,

From the inspector console please type this and press return:

document.getElementById('dosya_listesi_result' ); (you may try it with or without the ;

and let me know what you get in the console

[Horizon]

Dear Hakan,

From the inspector console please type this and press return:

document.getElementById('dosya_listesi_result' ); (you may try it with or without the ;

and let me know what you get in the console

Hi Antonio,

As I said it in first thread I can read it from console with same javascript.

[Antonio Linares]

Please try it like this:

oWebView:Eval( 'SendToFWH( ' + aaa + ' )' )

[Horizon]

Please try it like this:

oWebView:Eval( 'SendToFWH( ' + aaa + ' )' )

Hi Antonio,

Same.